From 83c2354bb3ba1532dab3ad716710fe9715272657 Mon Sep 17 00:00:00 2001
From: Pascal Davoust <pascal.davoust@eptica.com>
Date: Mon, 15 Mar 2021 11:53:13 +0100
Subject: [PATCH] Fix: remove contention during localized text lookup (JDK
 1.8+)

---
 .../xwork2/util/AbstractLocalizedTextProvider.java            | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/core/src/main/java/com/opensymphony/xwork2/util/AbstractLocalizedTextProvider.java b/core/src/main/java/com/opensymphony/xwork2/util/AbstractLocalizedTextProvider.java
index d197d05c0..fabb89c16 100644
--- a/core/src/main/java/com/opensymphony/xwork2/util/AbstractLocalizedTextProvider.java
+++ b/core/src/main/java/com/opensymphony/xwork2/util/AbstractLocalizedTextProvider.java
@@ -31,8 +31,6 @@ import java.lang.reflect.Field;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.text.MessageFormat;
-import java.util.Collections;
-import java.util.HashSet;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
@@ -65,7 +63,7 @@ abstract class AbstractLocalizedTextProvider implements LocalizedTextProvider {
 
     private final ConcurrentMap<MessageFormatKey, MessageFormat> messageFormats = new ConcurrentHashMap<>();
     private final ConcurrentMap<Integer, List<String>> classLoaderMap = new ConcurrentHashMap<>();
-    private final Set<String> missingBundles = Collections.synchronizedSet(new HashSet<String>());
+    private final Set<String> missingBundles = ConcurrentHashMap.newKeySet();
     private final ConcurrentMap<Integer, ClassLoader> delegatedClassLoaderMap = new ConcurrentHashMap<>();
 
     /**